code: def testFFT2D(self):
      self._VerifyFftMethod(
          INNER_DIMS_2D, lambda x: x, np.fft.fft2, signal.fft2d
      )
  
imports: import itertools
  import numpy
  import scipy.signal
  from tensorflow.compiler.tests import xla_test
  from tensorflow.python.framework import dtypes
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import gradients_impl
  from tensorflow.python.ops.signal import signal
  from tensorflow.python.platform import googletest
label_desc: Use image node_id 4 for calling the FFTTest obj's underlying member method code with example usage: obj.testFFT2D() without return types